Wide-range adjustable glide guidance method for hypersonic vehicles

To satisfy the requirements of both maximum and minimum ranges for boost-glide vehicles, an effective and complete gliding guidance method with adjustable wide-range coverage is proposed. Firstly, the characteristics of aerodynamic guidance based on angle of attack and bank angle in the atmosphere are analyzed, and the key difficulties of aerodynamic guidance for different ranges are identified. Secondly, based on the idea of total energy control, the control authorities of velocity and altitude are dynamically allocated in real time. A long-range gliding guidance method based on hybrid energy regulation is proposed to solve the underactuated guidance problem caused by simultaneous control of altitude and velocity via angle of attack. Thirdly, with a fixed angle-of-attack profile, constraints such as load factor and heat flux are transformed into gliding corridor boundaries. On the basis of drag acceleration and altitude feedback, a short-range gliding guidance method with aerodynamic deceleration based on the drag acceleration-velocity profile is designed. Terminal azimuth is constrained within the lateral corridor via on-off control of the bank angle sign. Finally, in long-range and short-range flight simulation verifications, the two guidance methods successfully guide the vehicle to the same terminal window under different range targets, systematically solving the guidance problem of range management for high lift-to-drag ratio vehicles in atmospheric gliding.